Attachment plug



Sept. 8, 1936.. MULDOQN 2,Q53,347

ATTACHMENT PLUG Original Filed July 14, 1930 INVENTOR W ATTORNEY? UNITED STATES PATENT OFFICE ATTACHIHENT PLUG Bernard F. Muldoon, Mountainview,.N. J., as-

signor to Henry Hyman, New York, N. Y.

Application July 14,

1930, Serial No. 467,758

Renewed February 5, 1936 2 Claims.

This invention relates to a novel and improved form of attachment plug, and more particularly to the contact member used therewith.

The novel features of the invention will be best understood from the following description and the annexed drawing, in which I have shown selected embodiments of the invention, and' in which:-

Fig. 1 is a view showing the inside of one form of plug constructed according to the form of the invention;

Fig. 2 is a view on the line 2-2 of Fig. 1;

Fig. 3 is a perspective view of the contact member detached from the base;

Fig. 4 is a view similar to Fig. 1, but showing a difierent embodiment of the invention;

Fig. 5 is a view on the line 55 of Fig. 4;

Fig. 6 is a View similar to Fig. 3, but showing a difierent form of contact member.

Referring first to Figs. 1, 2, and 3, the invention is shown as embodied in a plug having a base i and contact members 2 extending normal to the base. Through the bottom of the base is the usual aperture 3 through which conductors may be passed and connected to the plug.

In the form shown, the contact members comprise portions 3 generally parallel to and lying in contact with seats on the base and provided with holes 5 to receive binding posts 6, and threaded into the base. The rounded ends 1 of the portions 4 fit against shoulders 8 on the base, it, of course, being understood that this end need not be rounded, but can be of any other contour if desired.

Extending generally parallel to the contact 2, but in the opposite direction, is a projection 9. This projection is preferably in the form of a tongue integral with the contact member, and it fits snugly into a hole in the base, as plainly shown in Fig. 2.

By the above arrangement, the plug may be quickly assembled by inserting the tongue in the base and then passing the binding posts through the holes 5 into registering threaded holes in the base. The rounded end I will fit snugly into the shoulder 8 and resist any tendency to rotate about the projection 9. This, together with the snug fit of the projection in the hole of the base, may, under many circumstances, be enough to hold the member in place on the base, but when the binding post is also inserted, there is no danger of displacement of the contact member. The fit of the projection 9, however, is such that while permitting ready assemblage, nevertheless it is tight enough to prevent displacement under ordinary conditions.

Referring now to Figs. 4, 5, and 6, similar parts are given similar numbers, and a detailed description thereof will not be repeated. In this form. the principal difference over the form shown in Figs. 1, 2, and 3 is that the tongue 9' forming the projection is made by cutting out three sides of a rectangular piece from the blank and then bending the cut-out portion about the four sides of the rectangle. This is the preferred form, as it involves a saving in metal over the form shown in Fig. 3, in the preferred form the tongue being struck out from metal within the confines of the body portion of the blank forming the contact member.

I claim:

1. An attachment plug comprising a base with a seat thereon, a contact member having a flat portion disposed on said seat, said flat portion and seat having aligned holes, a binding post passing through the hole in the flat portion and threaded into one of said holes in the seat, a projection integral with said fiat portion extending substantially at right angles thereto and spaced from said binding post and fitting snugly but removably into a second hole in said seat, said contact member having a blade contact also integral with said fiat portion and extending outwardly from said seat substantially parallel to said projection, and a shoulder on said base against which the end of the flat portion of said contact member rests when said contact member is in place.

2. An attachment plug comprising a base with a seat thereon, a contact member having a fiat portion disposed on said seat, said fiat portion and seat having aligned holes, a binding post passing -through the hole in the fiat portion and threaded into one of said holes in the seat, a projection struck out from said fiat portion extending substantially at right angles thereto and spaced from said binding post and fitting snugly but removably into a second hole in said seat, said contact member having a blade contact integral with said flat portion and extending outwardly from said seat substantially parallel to said projection, and a shoulder on said base against which the end of the flat portion of said contact member rests when said contact member is in place.

BERNARD F. MULDOON. 

